12 12 036 Replacing all left ignition leads (M73)

Switch off ignition

Open clips (1).

Unfasten hose clip (2).

Disconnect plug-in connection (3).

Remove upper section of suction filter housing with mass air flow sensor.

Fig 1: Removing Suction Filter Housing Upper Section With Mass Air Flow Sensor (M 73)

Up to 1997 model:

Designate plug connections on tank vent valve and cut through.

Fig 2: Locating Plug Connections On Tank Vent Valve (1997 Model)

Up to 1997 model:

Open quick release connections on hoses for tank vent valve. Press down interlock (1) and remove hose (2). Remove both tank vent valves from bracket.

Fig 3: Releasing Tank Vent Valve Hoses Quick Release Connections (1997 Model)

From model year 1998:

Mark plug connectors (1 and 2) and pull off.

Fig 4: Marking And Removing Plug Connectors (Model 1998 Onwards)

From model year 1998:

Remove plug connector (1), hose clip (2) and air hose (3) and remove air-mass sensor with upper section of intake filter.

Fig 5: Removing Plug Connector, Hose Clip And Air Hose (Model 1998 Onwards)

From model year 1998:

Unclip air hoses (1 and 2) from bracket (3).

Fig 6: Removing Air Hoses Clip From Bracket (Model 1998 Onwards)

From model year 1998:

Disconnect plug connector (1) from solenoid valve.

Fig 7: Disconnecting Solenoid Valve Plug Connector (Model 1998 Onwards)

From model year 1998:

If necessary, release cable ties (1) and disconnect plug connector (2) from alternator.

Fig 8: Disconnecting Plug Connector From Alternator (Model 1998 Onwards)

From model year 1998:

Unfasten cable connector (1).

Fig 9: Releasing Cable Connector (Model 1998 Onwards)

From model year 1998:

Disconnect plug connector (1) and pull solenoid valve (2) out of bracket.

Fig 10: Disconnecting Plug Connector And Removing Solenoid Valve (Model 1998 Onwards)

From model year 1998:

Lay solenoid valve (1) and air hose (2) below engine.

Fig 11: Installing Solenoid Valve And Air Hose (Model 1998 Onwards)

Unfasten screw connection of ignition wiring harness on manifold.

Remove spark-plug connectors.

Fig 12: Releasing Manifold Ignition Wiring Harness Screw Connection

Unfasten cable connector on protective cap of distributor cap.

Unfasten clips (1 to 3) and remove protective cap for distributor cap.

Fig 13: Removing Distributor Protective Cap

Note sequence of ignition leads on the distributor cap and remove the distributor cap.

Installation:

Fig 14: Ignition Leads Fitting Instructions